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Push-pull cables are not suitable for heavy workloads, as
they will generate a lot of friction. Control over the engine
speed can therefore be very difficult. The use of a servo
cylinder in such applications will provide infinite and fingertip
control. The output movement is absolutely proportional to the input movement.
A 4602 servo cylinder together with a 3015 pressure hold back
valve can also be used as a throttle delay. This is however only
possible if the gear has a differential oil pressure from neutral
to the engaged position. The adjustable pressure hold back valve keeps
the 4602 servo cylinder inoperative until gear engagement takes place.
Once gear oil pressure is high enough to open the 3015 valve, oil is
permitted to flow to the servo cylinder making the throttle operative.
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